7 Li Residual Quadrupolar Couplings as a Powerful Tool To Identify the Degree of Organolithium Aggregation | Zendy

Pöppler AnnChristin | Zendy; Keil Helena | Zendy; Stalke Dietmar | Zendy; John Michael | Zendy

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7 Li Residual Quadrupolar Couplings as a Powerful Tool To Identify the Degree of Organolithium Aggregation

Author(s) -

Pöppler AnnChristin,

Keil Helena,

Stalke Dietmar,

John Michael

Publication year - 2012

Publication title -

angewandte chemie international edition

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 1433-7851

DOI - 10.1002/anie.201202116

Subject(s) - lithium (medication) , tetramer , random hexamer , monomer , residual , dimer , lithium amide , chemistry , isotopes of lithium , materials science , crystallography , polymer , computer science , organic chemistry , medicine , ion , algorithm , enantioselective synthesis , ion exchange , catalysis , enzyme , endocrinology

Lithium in the gel : The NMR spectroscopic properties of common organolithium and lithium amide reagents are investigated in the anisotropic environment of a stretched polystyrene (PS) gel. PS is stable towards reactive organometallic compounds and can be used at low temperatures. The residual quadrupolar couplings (RQCs) from a single 7 Li NMR spectrum can distinguish between high (hexamer, tetramer) and low (dimer, monomer) aggregation states (see scheme).

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